User privacy-preserving cloud storage scheme on CP-ABE
CAO Laicheng1, LIU Yufei1, DONG Xiaoye2, GUO Xian1
1. School of Computer and Communication, Lanzhou University of Technology, Lanzhou 730050, China;
2. Education Bureau of Zhuanglang County, Zhuanglang 744600, China
Abstract：A ciphertext-policy attribute based encryption (CP-ABE) user privacy-preserving cloud storage (UPCS) scheme was developed to protect user privacy in cloud storage environments. The data owner sets different access right attributes on different data files. The CP-ABE scheme has the trusted third-party embed the access right attributes into a ciphertext wich can be decrypted only when the user's attributes satisfy the access attributes of the ciphertext. The computational times of the data owner and users are reduced by authorizing some data owner and user operations to a distributed proxy server. Tests show that this scheme can effectively guarantee the user data and keyword privacy and reduce the data owner and user computational times.
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2018, Vol. 58 
